If a is a real number, then the real part of 4+i5a+i−i6 is( ). 若a为一实数,则4+i5a+i−i6的实部为( ). A.4a+1a2−1 B.4a+1a2+1 C.a2+4a+2a2−1 D.a2+4a+2a2+1相关知识点: 试题来源: 解析 D i1=i i2=−1 i3=−i i4=1 之后不断重复循环,由此可
结果一 题目 12 Given a is a real number, find the value of the algebraic expression √(a+2)-√(8-4a)+√(-a^2) 答案 12 -√2相关推荐 112 Given a is a real number, find the value of the algebraic expression √(a+2)-√(8-4a)+√(-a^2) ...
What is a real number? Imaginary Numbers: Imaginary numbers are also called complex numbers. When imaginary numbers are squared, the result is a negative number. Imaginary numbers are used in certain calculations, such as quadratic equations. They are the result of a real number multiplied by i...
Give an example of a real number. What are the types of real numbers? Let x and y be real numbers. If (x + y i) - (2 - 3 i) = -6 + 4 i, what are the values of x and y? What types of numbers are NOT real numbers?
member to help add to your list.19That way, you could exchange thoughts on what makes each of you special and the aspects of your personality that shine through. In fact, don’t wait until you’ve made a mistake to try this—it’s a gre...
8. If a is a real number and n is an integer, then |a"| = |a|" 相关知识点: 试题来源: 解析 case1:If a≥0,,thus case2:If a<0,if n is even,then and thus =if n is odd,,therefore we know when s is a real number and n is an integer 反馈 收藏 ...
12. Given a is a real number, find the value of the algebraic expression$$ \sqrt { a + 2 } - \sqrt { 8 - 4 a } + $$$ \sqrt { - a ^ { 2 } } $$ 相关知识点: 试题来源: 解析 $$ \underline { Z } / - \underline { Z } l $$ 反馈...
The real festivities start on Christmas morning with champagne and smoked salmon. After the King’s or Queen’s annual Christmas speech, it’s time for the main meal, typically including a turkey or roast beef accompanied by various side dishes. ...
C. 先行词被any, some, every, no, other等不定代词修饰时 先行词被the first, the last, the only, the same, the very或序数词等修饰时 先行词中既有表示人的名词,也有表示物的名词时 All is well that ends well. 结果好一切都好。 A contented mind is the greatest blessing (that) a man can...
22.Any small interruption - a price check, a chatty customer-can have downstream effects, holding up an entire line. If there are three lines in the store, delays will happen randomly at different registers. Think about the probabil...